The founder of this dynasty joined an alliance with Antipater and others against the regent Perdiccas, and conquered Cyrenaica. Arsinoe IV of this dynasty was forced to flee from her half-sister in a power struggle, while another ruler of this dynasty ordered the execution of the loser at the Battle of Pharsalus. It supplied several of the ships destroyed by Agrippa at Actium, and it was an ally of Mark Antony. It was founded by its namesake general, Alexander. For 10 points, name this Egyptian 
The founder of this dynasty joined an alliance with Antipater and others against the regent Perdiccas, and conquered Cyrenaica. Arsinoe IV of this dynasty was forced to flee from her half-sister in a power struggle, while another ruler of this dynasty ordered the execution of the loser at the Battle of Pharsalus. It supplied several of the ships destroyed by Agrippa at Actium, and it was an ally of Mark Antony. It was founded by its namesake general, Alexander. For 10 points, name this Egyptian dynasty whose rulers included Cleopatra VII.
The founder of this dynasty joined an alliance with Antipater and others against the regent Perdiccas, and conquered Cyrenaica.
{Ptolemaic} Dynasty or {Lagid} Dynasty [accept word forms]